Albert Barnes Commentary Ezekiel 42:2

"Before the length of a hundred cubits was the north door, and the breadth was fifty cubits." — Ezekiel 42:2 (ASV)

He brought me before a row of chambers 100 cubits long, east and west. The door of which lay on the north side of the chambers. The priests entered from the outer court (O); the breadth of this block of chambers was fifty cubits, north and south (Ezekiel 42:8).